Wouldn't mixing Venlafaxine with any phenethylamine or tryptamine like 4-HO-MET put you at risk of serotonin syndrome? 8(
How? Do 4-sub tryptamines do anything other than agonize sert receptors? You get in trouble with psychs/drugs that aren't purative serotonin agonists. Elevated levels of serotonin on 4-subs blunt the effects since more serotonin is there to compete with the 4-sub at binding to the receptor.
Phenethylamines, often are not just serotonin agonists (w/ phen psychedelics), and thats why they are more risky to combine with ssri's/snri's.
The real risk with ssri/snri combos is taking them with stuff that interferes with serotonin/norephinepherine release and re-uptake. 4 substituted tryptamines like 4-ho-met don't do that.